Electronic Features And Procedures; 4A. Autozero Function - gefran I3 Series Instruction Manual

The transmitter remains on the standard operating mode, till an external event happens.
The possible channels to activate the additional functions are the following:
- Pin CAL
- Magnetic pen
The operating manual explains the following features:
1) Autozero
2) Calibration (CAL)
3) Total Reset
The following pages explain the application modality, for all the additional functions.
The contents are related to application limits and aims.
1) A
utozero
Application mode
The Autozero function is activated by:
1) Positioning the magnet near the
Autozero label on the shell of the
sensor.
2) Short-circuiting the correct pins
(e.g. pins E-F for the 6 pin connec-
tor) for the external Autozero ver-
sion.
The magnet has to be maintained on
the Autozero position for a time within
2 to 5 seconds.
NOTE:
During the Autozero phase, the current output for the IE/IX transmitter series, can increase up to 7 mA.
That's a short variation only visible during the Autozero phase; it won't have any effects on the final signal.
Magnetic
2...5 seconds
pointer
ACTIVATION OF AUTOZERO AFTER THE FIRST INSTALLATION
The Autozero function makes it much easier to run calibrations after the first installation.
With the sensor installed and with the extruder at work temperature, wait 1 minute before running Autozero.
This delay gives the system time to recognize and compensate all of the signal drifts caused by tightening and tempe-
rature.
If the transmitter is kept powered, additional Autozero activations can be run immediately; on the other hand, you will
have to wait 1 minute each time the system is switched on again.
14

4. ELECTRONIC FEATURES AND PROCEDURES

4a - Autozero function
Limits
± 40% F.S. The Autozero effect will be visible
after waiting 2 seconds after the start
of the function.
The precision of the zero value will be
defined by the accuracy class of the
sensor.
1) Machine pressure = 0 bar and transducer
powered
2) Put magnetic pointer on marked spot
(2...5 seconds)
3) Remove magnetic pointer
4) Ready !
= marked spot
Remove
80175G_MAN_I3-IE-IN-IX_I7_11-2018_ENG
Result